The Java.util.Stack.size() method in Java is used to get the size of the Stack or the number of elements present in the Stack.
Syntax:
Stack.size()
Parameters: The method does not take any parameter.
Return Value: The method returns the size or the number of elements present in the Stack.
Below programs illustrate the Java.util.Stack.size() method:
Program 1: Stack with string elements.
// Java code to illustrate size() import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<String> stack = new Stack<String>();
// Use add() method to add elements into the Stack
stack.add( "Welcome" );
stack.add( "To" );
stack.add( "Geeks" );
stack.add( "4" );
stack.add( "Geeks" );
// Displaying the Stack
System.out.println( "Stack: " + stack);
// Displaying the size of Stack
System.out.println( "The size is: " + stack.size());
}
} |
Output:
Stack: [Welcome, To, Geeks, 4, Geeks] The size is: 5
Program 2: Stack with integer elements.
// Java code to illustrate size() import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<Integer> stack = new Stack<Integer>();
// Use add() method to add elements into the Stack
stack.add( 10 );
stack.add( 15 );
stack.add( 30 );
stack.add( 20 );
stack.add( 5 );
// Displaying the Stack
System.out.println( "Stack: " + stack);
// Displaying the size of Stack
System.out.println( "The size is: " + stack.size());
}
} |
Output:
Stack: [10, 15, 30, 20, 5] The size is: 5